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Zoology and wildlife conservation

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Abstracts » Zoology and wildlife conservation

Swimming sperm in an extinct Gondwanan plant

Article Abstract:

A 250-million-year-old fossil from Homevale in Queensland, Austria of anatomically preserved pollen tubes and swimming male gametes from Glossopteris, is described. The discovery of this simple reproductive system in Glossopteris has implication for its phylogenetic relationships with extant groups of seed plants and for the evolution of pollination biology in general.

Author: Nishida, Harufumi, Pigg, Kathleen B., Rigby, John F.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2003
Austria, Angiosperms, Extinct plants, Angiosperms, Fossil, Fossil angiosperms

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Fragments of the earliest land plants

Article Abstract:

Research indicates that spore-containing plant fossil fragments are the direct evidence to suggest that the earliest spores develop in large numbers within sporangia, which are fossilized remains of bona fide land plants. Analysis of spore wall ultrastructure suggests an affinity to liverwort.

Author: Charles, Wellman H., Osterloft, Peter L., Mohiuddin, Uzma
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2003
United Kingdom, Oman, Analysis, Spores (Botany), Spores, Plant evolution, Structure

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Ice-age steppe vegetation in east Beringia

Article Abstract:

The vegetation of the most recent ice age in east Beringia is analyzed. The macrofossils found in that region, depicts the number of mammals that were found in that region for its huge vegetation.

Author: Zazula, G.D., Froese, D.G., Schweger, C.E., Mathewes, R.W., Beaudoin, A.B
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2003
United States, Glacial epoch, Ice age

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Subjects list: Research, Plants, Fossil, Fossil plants
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